usaa brings advice. call or visit us online. we're ready to help. a new way to save on your prescriptions. it's the aarp medicarerx saver plus plan from unitedhealthcare. with this plan, you can get copays as low as a dollar through a preferred network pharmacy like walgreens -- where you'll find 8,000 convenient locations. best of all, this plan has the lowest part d premium in the united states -- only $15 a month. open enrollment ends december 7th. so call today or visit your local walgreens. >>. >> i've been a superintendent for 30 some years at many different park service units across the united states. the only time i've ever had a break is when i was on maternity leave. i have retired from doing this one thing that i loved. now, i'm going to be able to have the time to explore something different. it's like another chapter. >> greta: 11:00 is almost here, flash those studio lights, it's time for last call. jimmy fallon helping mariah carey spruce up the christmas classic but in this rendition they play in a school classroom. >> ♪ all i want